aboutBug in Firefox causing intermittent Malware warnings
I read follow:On Christmas eve, Google alerted us to a problem on the site that allowed malicious code to be inserted into some pages. This caused browsers that use Google's Malware database to include diyAudio in their list of flagged websites. We fixed the problem in short order and within 24 hours diyAudio was removed from the Google / StopBadWare Malware warning system.

Thank you for this advice. Unfortunately there are several postings from the mentioned day.
I think you mean this (last) posting:

Anthony Hughes, Mozilla QA (:ashughes) 2012-12-28 17:25:30 PST

binhaus, we have no intention to fix this for Firefox 17 given that we are a week away from releasing Firefox 18. Any users who cannot wait are welcome to use the latest Firefox 18 Beta build in the meantime. The current Beta is very close to what we will actually be releasing on January 8.

Sorry, I know it's not ideal but this is the best solution we can offer at this time.